Question

Can someone help me with this I'm so lost >:(

Answer 1

There's a little something called... the Pythagorean Theorem... ;)

Answer 2

I think you can solve this by using the formula A = absin(90)/2

Answer 3

I mean, A = [(AB)(BC)sin90]/2

Answer 4

Uhh I'ma need help with that lol

Answer 5

Just substitute the given.
It's like A = (21*72sin90)/2

Answer 6

There's no need to jump to 'trigonometric' conclusions....
For any right triangle, the longest side c is always given by
\[\Large c = \sqrt{a^2 + b^2} \] where a and b are the two other sides.

And @Yttrium don't you think sin90 is... redundant? ;)

Answer 7

OMG. HAHAHA. I thought find the area of the triangle. LALALALA!

Answer 8

Ohh lord @Yttrium you gon make me fail lol

Answer 9

\[BC = \sqrt{AB^2 +AC^2 }\]
Just substitute the value, and you can now solve for C. hahahaha. I'm so sorry, I really though it was for area. hahaha. Maybe an effect of too much hunger. :D

Answer 10

Lord Yttrium? That's a laugh :/

And yes @Yttrium that's what we needed :/

Answer 11

@terenzreignz , I know I'm stupid. And you're the one to be called a Lord.

Answer 12

No... I'm not... @ Lord Yttrium... *Master* Terence is more like it XD


anyway @torontoXO you have your answer yet? :D
Just add the squares of the two given sides and THEN take its square root, it's easy! :D

Answer 13

I'ma do that now lol

Answer 14

Yes... I'll wait :)

Answer 15

It's okay to call @yttrium for me. I'm still willing to help. :)

Answer 16

75?

Answer 17

Got it. :)

Answer 18

Swagg

Answer 19

Awesome :)